I would have thought that the introduction of a new type not yet covered by an airline's EBA (ie what's it's pay rate going to be?) actually
is ambiguous and could, should the parties agree, lead to a 'variation' negotiated under the existing agreement.
But, then again, that would be a test of a company's goodwill and desire to 'engage' with its pilots. Time will tell the
VB/VA pilots whether their management are actually their friends, or wedge-drivers.